package com.zenithmind.version.service.impl;

import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.zenithmind.common.context.UserContext;
import com.zenithmind.version.mapper.CommitMapper;
import com.zenithmind.version.pojo.domain.Commit;
import com.zenithmind.version.pojo.dto.CommitCreateDTO;
import com.zenithmind.version.pojo.query.CommitQueryDTO;
import com.zenithmind.version.pojo.vo.CommitVO;
import com.zenithmind.version.service.CommitService;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.time.LocalDateTime;
import java.util.List;

/**
 * 提交服务实现类
 * 
 * @author ZenithMind Team
 * @since 2025-01-09
 */
@Slf4j
@Service
@RequiredArgsConstructor
public class CommitServiceImpl extends ServiceImpl<CommitMapper, Commit> implements CommitService {

    @Override
    @Transactional(rollbackFor = Exception.class)
    public CommitVO createCommit(CommitCreateDTO createDTO) {
        log.info("创建提交: {}", createDTO.getMessage());
        
        // 生成提交哈希
        String commitHash = generateCommitHash(createDTO.getRepositoryId(), createDTO.getMessage());
        
        Commit commit = new Commit();
        BeanUtils.copyProperties(createDTO, commit);
        commit.setHash(commitHash);
        commit.setShortHash(commitHash.substring(0, Math.min(8, commitHash.length())));
        commit.setAuthorId(UserContext.getUserId());
        commit.setCommitterId(UserContext.getUserId());
        commit.setCommitTime(LocalDateTime.now());
        commit.setCreateTime(LocalDateTime.now());
        commit.setUpdateTime(LocalDateTime.now());
        
        save(commit);
        
        return convertToVO(commit);
    }

    @Override
    public IPage<CommitVO> getCommitPage(CommitQueryDTO queryDTO) {
        log.info("分页查询提交");

        Page<CommitVO> page = queryDTO.toPage();

        // TODO: 实现分页查询逻辑
        return page;
    }

    @Override
    public CommitVO getCommitDetail(String id) {
        log.info("获取提交详情: {}", id);
        
        Commit commit = getById(id);
        if (commit == null) {
            throw new RuntimeException("提交不存在");
        }
        
        return convertToVO(commit);
    }

    @Override
    public CommitVO getCommitByHash(String repositoryId, String commitHash) {
        log.info("根据哈希获取提交: repositoryId={}, commitHash={}", repositoryId, commitHash);

        // TODO: 实现根据哈希查询提交
        return null;
    }

    @Override
    public List<CommitVO> getRepositoryCommits(String repositoryId, String branchName, Integer limit) {
        log.info("获取仓库提交历史: repositoryId={}, branchName={}", repositoryId, branchName);

        // TODO: 实现仓库提交查询
        return List.of();
    }

    @Override
    public List<CommitVO> getBranchCommits(String repositoryId, String branchName, Integer limit) {
        log.info("获取分支提交历史: repositoryId={}, branchName={}", repositoryId, branchName);

        // TODO: 实现分支提交查询
        return List.of();
    }

    @Override
    public List<CommitVO> getUserCommits(String authorId, String repositoryId, Integer limit) {
        log.info("获取用户提交历史: authorId={}, repositoryId={}", authorId, repositoryId);

        // TODO: 实现用户提交查询
        return List.of();
    }

    @Override
    public List<Object> getCommitChanges(String commitId) {
        log.info("获取提交的文件变更: commitId={}", commitId);

        // TODO: 实现提交变更查询
        return List.of();
    }

    @Override
    public List<CommitVO> getParentCommits(String commitId) {
        log.info("获取提交的父提交: commitId={}", commitId);

        // TODO: 实现父提交查询
        return List.of();
    }

    @Override
    public List<CommitVO> getChildCommits(String commitId) {
        log.info("获取提交的子提交: commitId={}", commitId);

        // TODO: 实现子提交查询
        return List.of();
    }

    @Override
    public Object compareCommits(String repositoryId, String fromCommit, String toCommit) {
        log.info("比较两个提交的差异: repositoryId={}, fromCommit={}, toCommit={}", repositoryId, fromCommit, toCommit);

        // TODO: 实现提交比较
        return null;
    }

    @Override
    public List<CommitVO> getCommitsBetween(String repositoryId, String fromCommit, String toCommit) {
        log.info("获取两个提交之间的提交列表: repositoryId={}, fromCommit={}, toCommit={}", repositoryId, fromCommit, toCommit);

        // TODO: 实现提交区间查询
        return List.of();
    }

    @Override
    public List<CommitVO> searchCommits(String repositoryId, String keyword, String branchName, String authorId, Integer limit) {
        log.info("搜索提交: repositoryId={}, keyword={}", repositoryId, keyword);

        // TODO: 实现提交搜索
        return List.of();
    }

    @Override
    public Object getCommitStatistics(String repositoryId, String branchName) {
        log.info("获取提交统计信息: repositoryId={}, branchName={}", repositoryId, branchName);

        // TODO: 实现提交统计
        return null;
    }

    @Override
    public Object getUserCommitStatistics(String authorId, String repositoryId) {
        log.info("获取用户提交统计: authorId={}, repositoryId={}", authorId, repositoryId);

        // TODO: 实现用户提交统计
        return null;
    }

    @Override
    public Object getCommitActivity(String repositoryId, String startDate, String endDate) {
        log.info("获取提交活动统计: repositoryId={}, startDate={}, endDate={}", repositoryId, startDate, endDate);

        // TODO: 实现提交活动统计
        return null;
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public CommitVO revertCommit(String repositoryId, String commitId, String branchName, String userId) {
        log.info("回滚提交: repositoryId={}, commitId={}, branchName={}", repositoryId, commitId, branchName);

        // TODO: 实现提交回滚
        return null;
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public CommitVO cherryPickCommit(String repositoryId, String commitId, String targetBranch, String userId) {
        log.info("挑选提交: repositoryId={}, commitId={}, targetBranch={}", repositoryId, commitId, targetBranch);

        // TODO: 实现提交挑选
        return null;
    }

    @Override
    public Object getCommitGraph(String repositoryId, String branchName, Integer limit) {
        log.info("获取提交图谱: repositoryId={}, branchName={}", repositoryId, branchName);

        // TODO: 实现提交图谱
        return null;
    }

    @Override
    public Boolean validateCommitHash(String repositoryId, String commitHash) {
        log.info("验证提交哈希: repositoryId={}, commitHash={}", repositoryId, commitHash);

        // TODO: 实现哈希验证
        return true;
    }

    @Override
    public Object getCommitSignature(String commitId) {
        log.info("获取提交签名信息: commitId={}", commitId);

        // TODO: 实现签名获取
        return null;
    }

    /**
     * 生成提交哈希
     */
    private String generateCommitHash(String repositoryId, String message) {
        // TODO: 实现真正的哈希生成逻辑
        return "commit_" + System.currentTimeMillis();
    }

    /**
     * 转换为VO
     */
    private CommitVO convertToVO(Commit commit) {
        CommitVO vo = new CommitVO();
        BeanUtils.copyProperties(commit, vo);

        // TODO: 补充其他字段转换

        return vo;
    }
}
